Dumping mechanism for mobile loading apparatus



Feb. 20, 1951 H. 0. DAY 2,542,799

DUMFING MECHANISM FOR MOBILE LOADING APPARATUS Filed Aug. 25, 1948 4 Sheets-Sheeb 1 INVENTOR Herbert 0. Day BY Feb. 20, 1951 H. 0. DAY 7 2,542,799

DUMPING MECHANISM FOR MOBILE LOADING APPARATUS Filed Aug. 25, 1948 4 Sheets-Sheet 2 III INVENTOR Herbert 0. Day BY ATTORNEY Feb. 20, 1951 H. 0. DAY

DUMPING MECHANISM FOR MOBILE LOADING APPARATUS 4 Sheets-Sheet 3 Filed Aug. 25, 1948 v 7/ I u INVENTOR Herbert 0. Day

ATTORNEY F'atentecl Feb. 2U, 195i NlTlEljt res a gy s i QE DUMFING MECHANISM FUR MUEZLE LOADENG APPARAhU$ Herbert 8. Day, Bowling Green, @hio Application August 25, 1948, Serial lilo. 46,139

(Cl. 298-1l ,1

Jill Claims.

This inve type which hav ontal posiv .on

b tion. More 1: that of ump bit/1 a body whic. is ada d to call-y and to upon a of a fiowable material such as sand, gravel, and especially ready mix d concrete of the air-entrained type.

An object of this invention devise mechanism for elevating the to a heigh' above the vehicle frame, that is significanl higher than is possible with the mechanisms :5 conventional trucl-ts so as permit the flowable burden to discharge from a relatively greater height that offers the advan' e of posing of the burden more expedi .o sly, conveniently, and economically, as well in a more direct manner of delivery from the body to the point of Such high dumping arrangement avoids the necessity of first du. oing then re-handling and re elevating the burden to the point or use.

A more specific object is that with increased height available from which to dump the flowable burden, that burden may be disposed of conveniently and directly through an inclined conduit or spillway which may extend from the point of discharge or spout oi the body to the point of disposal or use. High dumping a howable concrete mix from the truck directly to the point of use oiTers greater operational flexibility of disposal or the burden on job, and avoids a re-handling and ire-elevating of the dumped concrete mix, and thus saves time, labor, and expense.

These objects as well as others are attainable by the use of this invention embodied in a self-propelled vehicle having a horizontall extending vehicle frame and a burden-carrying body adapted to be tilted for dumping the burden and to be returned to normal horizontal position upon the vehicle frame by incorporating in such a vehicle additional or auxiliary apparatus whereby the body can be additionally elevated over and above the height attainable by the tilting the conventional tilting frame in dump trucks.

Such additional or auxiliary elevating apparatus comprises What is herein called a secondary or sub-frame unitary with the body and in turn movably mounted upon the tilting frame, together with auxiliary elevating mechanism mounted upon and bodily carried by the tiltable frame for attaining the extra elevation of the over above the elevation attained by? the conventional tilting operation. Therefore, a ination embodying this ines a main horizontal vehicle frame swingably mounted upon rains and actuate. by mechanism *l't-G'YLJI. upon and carried the vehicle frame,

sub-frame rnovably mounted upon the tilt-. able frame so as to be capable of beirc additional elevated, together with auxiliary actuatingmounted upon and in turn bodily by tiltable frame for effecting the al or secondary elevation of the body following primary elevation by tilting.

According to one feature the body is movable be elevated or lowered relative to the flame by way of a parallel link connection cperatively interconnects the tilting frame; the body. r-lccording V to another feature the actuating mechanism for so elevating or lowering the body relative to the tilting frame comprises an auxiliar hydraulic power cylinder mounted upon and carried by the tilting frame.

More specific features lie in the manner of mountin the auxiliary hydraulic power cylinder with respect to the tilting frame with reto the body.

Still other features lie in the arrangement and manner of adjustability of discharge chute or spillway attached to the outlet or spout of the body. Another feature lies in providing the bottom of the burden-carrying body with a hump over which the burden must cascade thereby effecting a degree of stirring of the burden or concrete mix while the same is in the process discharging from the body.

Fig. 1 is a side view of the dump truck somewhat diagrammatic showing the burden-carrying body in normal horizontal, that is lowered, position as well a s... way discharge attachinen in inoperative position.

2 shows the body tilted to a medium high pos' for dumping its burden but with the sub, frame as well as the spillway still inactive.

Fig. 3 shows the body additionall raised to high dumping position and with the spillway active position.

Fig. i is a plan viewof the rear end portion. of the Fig. l trucl: with the body omitted to show the general arrangement of hydraulic power cylin ders for actuating the tilting frame and for actu ating the sub frame.

,end.

"19 is a discharge conduit or spillway 20 compris- Fig. is an enlarged side view of the main kinematic structural elements involved in the tilting and additional elevating of the body, including the arrangement of hydraulic power cylinders for effecting the tilting and the elevating.

Fig. 6 is a perspective view of the truck showing the underside of the movable parts when the body is substantially in its fully raised position.

Fig. 7 is an enlarged perspective view showing the front of the movable parts in their Fig. 6 position although with the body omitted.

A dump truck embodying the invention according to Fig. 1 comprise a burden-carrying body If] in normal horizontal or non-tilted position mounted so as to be carried by and unitary with a sub-frame or auxiliary frame H which in turn is carried by a tiltable frame 12 carried by the main vehicle frame I3 and swingable or tiltable thereon about a transverse horizontal axis at an elevation above the plane of the frame I3 as indicated by a pivotal mount.- ing 14 at the'rear end of the vehicle frame I3. This pivotal mounting comprises a pair of axles l4 and M (see Fig. 7), the axle I4 being carried by brackets 14 and 14 and the axle l4 being carried by brackets M and H which brackets arise from and are rigidly connected with the rear end portion of the vehicle frame I3. M represents the offset or upwardly sloped rear end. on each of the longitudinals of frame 12 to permit the axis to be disposed above that frame. The vehicle frame i3 is partof a truck chassis which is supported upon rear wheels W1 and front wheels W2. The truck has the usual drivers cab indicated at C and has the usual motor indicated at M.

In Fig. 2 the tiltable frame 12 is shown to have been swung or raised to its extreme upward tilted position together with the body If], such tiltin being effected by a primary or main hydraulic actuating cylinder l5 carried by the vehicle frame and disposed centrally and longitudinally thereof. That is the rear or lower end of the main cylinder I5 is pivotally mounted as at I6 upon the vehicle frame l3 so as to be swingable abouta horizontal axis extending transversely of the vehicle frame as well as parallel to the pivotal axis about which the tiltable frame i2 is swingable. The cylinder l5 has a piston rod H which is pivotally connected as at 18 to the tiltable frame 12 but at an elevation above that frame which piston rod in Fig. 2 as well as in Figs. 6 and 7 is shown in its extreme extended position defining the extreme upward tilted position of the tiltable frame l2. The pivot pin I8 is carried by another dual bracket formed of spaced-apart component plates l8 and 18 reaching upwardly from frame l2 and which are connected by the pivot pin 18 so that there is a plate on each side of the piston rod l1. Since this dual bracket l8 and 18' projects upwardly from the auxiliary frame II, it would engage and interfere with the bottom of the body I 0, unless a hump IEi fFig. 1) is made in that bottom which provides an upwardly extendin cavity inthe bottom of the body into which that bracket may extend, when the body is in burdencarrying position as shown in Fig. 1.

The body 10 is shown to be particularly shaped and designed for carrying and for discharging a more or less flowable charge such as concrete mix and therefore is shown to have a constricted outlet portion or spout I 9 at its rear or outlet Associated with or attached to the spout 4 ing a discharge-receiving initial or tray portion disposed directly underneath the outlet spout l9 and having substantially fixed relationship thereto, and further comprising a trough portion or chute 20 pivotally connected to the tray portion 20 a at 20 and therefore swingable upwardly to an inactive or out-of-the-way position such as shown in Figs. 1 and 2 or swingable downwardly that is to a downwardly inclined active position (see Fig. 3) for conveying the discharging burden to a point of use.

The spout I9 is provided with a conventional closing element in the form of a swingably mounted segment 2| swingable about a horizontal axi or pivot indicated at 2| and operable for opening or closing the spout It by means of a hand lever 2U. Means for mounting the closure element 2| as well as the discharge conduit 20 are diagrammatically shown to comprise a bracket construction 22 attached to or connected with the rear end portion of the body I0 or spout l9. Means for adjusting and secur-. ing the discharge conduit 20 in a desired position or at a desired slope are diagrammatically indicated at 23. Means for adjusting the discharging position of the conduit means also include means for swinging the conduit or chute in a lateral direction, that is about a vertical axis, so as to enable the chute to reach discharge points within a radius or area converable by such lateral swinging movement.

The body H] can be additionally elevated from its Fig. 2 to its Fig. 3 position to the extent of the vertical distance H. This additional elevation of the body is effected by means of a pair of secondary or auxiliary hydraulic power cylinders 24 and 25 which are similar to one another and symmetrically disposed with respect to the main cylinder [5. That is, at each side of the main cylinder there is disposed one of the auxiliary cylinders which latter thus occupy the spaces Si and S2 within the vehicle frame at each side of the main cylinder [5 (see the plan view in Fig. 4). Both auxiliary cylinders 24 and 25 are mounted upon and carried by the tiltable frame l2. That is, the tiltable frame [2 has rigidly connected therewith a pair of bracket constructionsv 26 and 21 each of which serves to have swingably mounted thereon one of the auxiliary cylinders 24 and 25. Thus the bracket construction 26 is really a dual bracket as can be seen from Figs. 4, 5, and 6, with one component plate thereof on each side of, the power cylinder 24, with the bottom or lower end pivotally mounted upon the lower end of its supporting bracket construction 26 as is indicated by the pivot 28. Ina similar manner the companion auxiliary cylinder 25 is mounted upon its supporting bracket construction 21 which, therefore, needs no separate description. However, it will be noted (see Fig. 1) that the bracket construction 26 or 2? extends downwardly and rearwardly through and indeed to a point below the j the vehicle frame 13, that is to a point indicatecl to be only a distance E above the ground indicated at G. It will also be noted that these bracket constructions for the auxiliary cylinders are disposed and designed so that they will clear the axle construction of the rear wheels W1 when the. tiltable frame l2 then unitary with the body In is being swung from its (Fig. 1) normal horizontal position to its (Fig. 2) extreme upwardly tilted position. 7 I

The sub-frame H which is unitary with the body If] normally rests in horizontal position as e s raves.

does the body It upon the tiltable frame [2 (see tilting angle A may be additionally elevated the distance H because of a parallel link connection movably interconnecting the body it with the tiltable frame 52. This parallel link connection comprises a pair of parallel links 2% and 359 each of which in itself is in the nature of an H -shaped frame construction (more clearly illustrated in Fig. 7) extending substantially the width of the tiltable frame i2. That is to say, the link 29 is pivotally connected to the tiltable frame l2 at 29 and pivotally connected to the sub-=frame H at 23 while the link St is pivotally connected to the tiltable frame ill at til and to the-sub-frame if at 3t The auxiliary cylinders 2d and 25 have piston. rods it and respectively the outer ends of which are pivotally connected to the link 29 atan intermediate point thereof, namely at Ze and at 25 Therefore, after the main cylinder has extended its-piston rod il to tilt the body it! from the normal Fig. 1 position to the Fig. 2 tilted position, the auxiliary cylinders 2t and both be actuated simultaneously in order to additionally elevate the body it the vertical distance l-i swinging the parallel links fit and 3t from the Fig. 2 position to their Fig. 3 position.

When 31 H2 is its tilted (Fig. 2) position an is do the lower edge or point P of the burdenreceiving discharge tray 2th, that discharge point P thus being disposed a vertical distance in above the ground G- and disposed a horizontal distance d1 from the end of the vehicle frame is, the disbody ill also places the discharge point P a greater horizontal distance (12 from the end of the vehicle frame it. At this high-dumping elevation the discharge point P may be utilized when de sired with chute it still upwardly swung and in its inactive position as indicated in dot-anddash lines.

However, the Fig. 3 high-dumping position of the body it permits of effective use of the discharge chute Zt after it has been swung downwardly from the dct-and-dash line position to the full-line position. Thus an effective discharge point Q at the lower end of the now downwardly inclined chute 2t attains a horizontal distance (is from the rear end of the vehicle frame l3 and yet a vertical distance he above ground G, that is a distance ha approximately shown to be still as great as the distance 711 of the Fig. 1 position of discharge point P.

It will thus be seen that when the body it is in itsFig. 3 high-dumping position use can be made of a high-dumping point P a horizontal distance d2 from the rear end of the vehicle frame it, or else a lower discharge point Q can be utilized at a significantly increased horizontal distance 033 from the rear end of the vehi le frame H.

For the operation of the hydraulic power cylinders, that is the main cylinder it and the auxiliary cylinders 2t and 25, there are provided a pair of control levers ti and 32. Lever 3! controls the operation of the main cylinder [5 and ed by lever 32 controls the operation of the auxiliary cylinders 28 and 25, all by means of suitably directed hydraulic pressure fluid supplied by a hydraulic pressure pump (not shown) which may be driven from the truck engine.

Interlocking means .(not shown) may be provided between the two control levers 3t and 32, effective to compel an operator to first cause the tilting of the body it from its normal Fig. 1 position to its Fig. 2 intermediate position before he is allowed to additionally raise the body it from the Fig. 2position to the Fig. 3 high-dumping position. Conversely. such interlocking mechanism w ill compel an operator to first lower the body it from its Fig. 3 high-dumping to its Fig.

2 intermediate position before he can. further lower the body if? from its Fig. 2 tilted position to the Fig. 1 normal horizontal position.

al horizontal position to its high-du1nping incl d position, the dumping mechanism as described be operated by first shifting the control lever i to cause the main cylinder to extend its piston rod ll to effect tilting of the body dumping mechan sm herein described may be operated by first shifting the control lever 32 in order to cause the piston rods E i and to retract into their respective auxiliary cylinders 24 and 25 thus moving the body iii from the Fig.

3 high-dumplng position to the 2 intermediate position, and then to shift the control lever 35 in order to cause the piston rod ii to retract into the main cylinder 55 thus moving the body it from the intermediate Fig. 2 tilted position back to the Fig. 1 normal horizontal position.

The bottom of body it is formed with a hump are (Fig. 1) having a forward-sloping or inclined face, a fairly fiat top face and an abrupt or vertical or rear face. This hump Id is hollow accommodating in it the top portion of a pair of brackets it and 58 (see Fig. 7) which brackets are fixed upon and rise from the tiltable frame 52 and carry the pivotal connection it of main piston rod H. The burden or concrete mix cascades over the hump le while being discharged from the body it thereby being subjected to a degree of stirring which facilitates the discharge.

What I claim is:

l. A dump truck having a wheel-supported vehicle frame, a tiltable frame having movable therewith a truck body adapted to contain a burden, which tiltable frame is carried by and hinged to the rear end of the vehicle frame so as to be tiltable from a normal horizontal position' to an inclined burden-dur...ping position, and main actuating means effective between the vehicle frame and the tiltable frame for tilting the same together with the body, characterized by auxiliary elevating mechanism for additionally and bodily elevating said body a distance above its position attained by the tiltin of the tiltable frame comprising parallel link means operatively interconnecting said tiltable frame and said body, and auxiliary actuating mechanism mounted Hence, in order to raise the body it from its linen and supported by said tiltable frame for bodily moving said body to. and from said tilt able. frame. alone a path defined the movement of said parallel link means.

2. A dump truck having a wheel-supported vehicle frame, a tiltable frame having movable therewith a truck body adapted to contain a burden and hinged to the rear end of the vehicle frame so as to be tiltable from a normal horizontal position to an inclined burden-dumping position, main hydraulic power. cylinder means effective between the vehicle frame and the tilt-' able frame for tilting the same together with said body, characterized by auxiliary elevating. mech.. anism for additionally and bodily elevating said body a distance above its position attained by the tilting of the tiltable frame comprising paraL. lel link means operatively interconnecting said tiltable frame and said body, and auxiliary hydraulic power cylinder means mounted upon and supported by said tiltable frame for bodily moving said body to and from said tiltable frame along a path defined by the movement of said parallel link means.

3. A dump truck according to claim 2, in which the-main cylinder means comprise a single cylinder, and. the auxiliary cylinder means comprise a pair of cylinders disposed to have said single cylinder between them.

4. A dump truck, according to claim 2', in which the main cylinder means are connected to the tiltable frame at a point above the plane thereof.

5. A dump truck according to claim 2 with the addition that a bracket construction is provided toextend. upwardly from the tiltable frame to which bracket construction the main cylinder means are connected, and that an inwardly pros J'ecting hollow hump is provided in the bottom of the. truck body forming a cavity into which extends said bracket construction when said body in horizontal position.

6. A dump truck according to claim 2, with the addition of a bracket construction depending from said tiltable frame and upon which said auxiliary cylinder means are mounted.

A dump truck accordmatc claim 2 which. said parallel link means: comprise a fir t link. member near the pivotal axis of the. tiltable frame and a second link member spaced from the first, member a distance away from said pivotal axis in. which said auxiliary cylinder means are connected with said first member, with the addition of a bracket construction extending downwardly and rearwardly from said tiltable frame and sup, porting said auxiliary cylinder means! 8. ,A dump truck accordin to. claim 2:, in which the pivotal axis of the tiltable frame is dispo ed above the plane of that frame when the same is in horizontal position 7 9. A dump'truck according to claim 2 in which the main power cylinder means comprise. a single cylinder and the auxiliary power cylinder means comprise. a pair of cylinders having said singlecylinder between them, in which said parallel link means comprise link members, one member of which is located adjacent the pivotal axis of the tiltable frame, said member being in the form of an Heshaned having verticals with their lower ends pivotally connected to respective sides of the tiltable frame'and their upper ends pivotally connected to the b dy, and in which each one of said pair of cylinders is opera ively connected to a respective vertical at an intermediate point thereof, i

10. A dump truck according to claim 2,, with the addition that a sub-frame i provided unitarywith said bodmand that said, parallel link means are pivotally connected w h said sub-frame.

HERBERT Q. DAY.

' REFERENCES crrnn The following references are of record in the file of this patent:

UNITED STATES PATENTS Number I Name Date 1,113,443 Isom Oct. 13, 1.91% 1,733,988 Barnard Oct. 29, 1929 2,234,599 Johnston Mar. ll, 1.941- 

